Consider the extended LAN connected using bridges B$1$ and B$2$ in Fig. $4-33($b$).$ Suppose the hash tables in the two bridges are empty. Which of these data transmissions

leads to a broadcast:

$($a$)$ A sends a frame to C$.$

$($b$)$ B sends a frame to E$.$

$($c$)$ C sends a frame to B$.$

$($d$)$ G sends a frame to C$.$

$($e$)$ E sends a frame to F$.$

$($f$)$ D sends a packet to C$.$

Assume that every frame is sent after the previous frame has been received.